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HOLLEY 3.5 InHg Single Stage Power Valve
HOLLEY 3.5 InHg Single Stage Power Valve - Image 2
HOLLEY 3.5 InHg Single Stage Power Valve - Image 3

HOLLEY 3.5 InHg Single Stage Power Valve

£21.92 Inc. VAT

Only 1 left in stock

SKU: HOL125-35 Categories: , , Tag: Brand:

Description

Part Number: 125-35

Holley Single Stage Power Valve – 3.5 Hg Opening

Optimize your Holley carburettor fuel enrichment curve with this high-precision 3.5 In. Hg single stage power valve.

Key Features

  • ✓ Calibrated to open at 3.5 inches of vacuum (3.5 Hg)
  • ✓ Standard flow design for accurate high-load enrichment
  • ✓ Heavy-duty diaphragm construction for fuel resistance
  • ✓ Direct fit for Holley 2300, 4150, and 4160 series carburettors
  • ✓ Includes reusable high-quality power valve gasket

Technical Specifications

Brand Holley
Part Number 125-35
Stage Single Stage
Vacuum Rating 3.5 In. Hg
Flow Rate Standard Flow

What’s Included in the Box

  • 1 x Holley 3.5 Hg Single Stage Power Valve (PN 125-35)
  • 1 x Sealing Gasket

Holley products represent the gold standard in performance fuel delivery. At JP Racing, we carry genuine Holley components with fast UK delivery and dedicated motorsport support to ensure your setup runs at peak efficiency.

Frequently Asked Questions

The 3.5 Hg rating indicates that the power valve is calibrated to open when engine manifold vacuum drops down to 3.5 inches of mercury. This delivers additional fuel enrichment during heavy engine loads or wide-open throttle conditions.

A good rule of thumb is to measure your engine's idle vacuum in gear (for automatics) or in neutral (for manuals), then divide by two. A 3.5 Hg power valve is typically suitable for high-camshaft, low-vacuum performance or race engines idling around 7-8 In. Hg.

Yes, the Holley 125-35 power valve features standard threads and fitment designed for Holley 2300, 4150, 4160, and 4500 Dominator modular carburettors.

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